Improvement in knife sharpeners and polishers



E. A. su 'su gLL. Knife Sharpener andPolisher.

Patented Oct--11 8 UNITED STATES PATENT OFFICE.

EDWARD .A. BUSHELL, OF OAKLAND, CALIFORNIA.

IMPROVEMENT IN KNIFE SHARPENERS POLISHERS.

Specification forming part of Letters Patent No. 168,717, dated October11, 1875 application filed October 10, 1873.

To all whom it may concern:

Be it known that I, EDWARD A. BUSHELL, of Oakland, in the county ofAlameda and State of California, have invented a Knife Scourer andPolisher, of which the following is a specification:

The object of my invention is to scour and polish alternately over thesame surface, regulating the same by the amount of pressure applied, andto avoid the use of moisture or anything having a tendency to rust theknife.

The nature of my invention will be more fully understood by reference tothe accompanying drawing.

Figure 1 is a plan, and Fig. 2 a sectional View, showing theconstruction of the polisher, having a ribbed or corrugated surface ofindiarubber, with flour of sulphur incorporated, constructed withalternate ridges and grooves,

being equal hollows and rounds, which, when obverted or placed face toface, fit the rounds to the hollows of each. This surface of rubber andemery compound is securely attached to a body of wood constructed asshown in the drawing. i

The object of the ribbed surface is twofold: First, thehollows aredesigned to hold the loose powder of emery or other sharppolishing-powder, and prevent the same from being swept off by theknife. Secondly, to secure a fine polishing-surface upon the higher partof the ridges, as will be shown. It will be seen that the coarse portionof the emery or other polishing-powder falls and remains in the grooves.

The following is the operation of scouring and polishing knives: Thepowder is sifted or properly distributed over the surface of thepolisher, the coarser portion remaining in the grooves. The knife isfirst pressed firmly down upon the surface. The ridges yielding allowsthe same to bear upon the coarser emery in the grooves, which quicklyscours and sharpens it. When sufficiently scoured it is drawn quicklyand lightly over the surface of the ridges, (which contain only the fineemcry,) and all the scratches are removed, and a very fine polishsecured.

The advantages of this arrangement are seen in the fact that the amountof polishing or scouring surface used is regulated by the degree ofpressure applied with the knife.

The elastic or yielding nature of the ridges under pressure allows theknife to bear upon the coarse powder contained in the, grooves; and bylightly and quickly drawing the knife over the ridges only the fineemery that is in corporated in the india-rubber, and the fine dust thatadheres totherubber,are brought into contact with the knife, thusremoving all the scratches, and leaving a fine and beautiful polish.

When not in use the emery is swept from the grooves into a box or otherreceptacle to prevent waste.

Having thus described my invention, what I claim isi The above-describedknife-scourer, having a' corrugated elastic surface, and provided with ascouring material, in the manner set forth.

EDWARD A. BUSHELL.

Witnesses:

J. 0. 33mm, JOHN H. REnsroNE.

